The George Griswold Frelinghuysen Arboretum (127 acres) is an arboretum located at 53 East Hanover Avenue, Morristown, New Jersey. It is open daily without charge. It is also the headquarters of the Morris County Parks Commission.
The arboretum features thematic collections of plant life, including ornamental grasses, spring-blooming shrubs and perennials, summer shrubs and cutbacks, fall fruit and foliage, shade trees, and a garden called the "promising plants garden" which has underused plants supplied by nurseries, growers, and breeders. In front of the large main house there is the Great Lawn, a large gently sloping manicured grassy expanse in the style of an English county manor landscape; it is the site of outdoor concerts in the warmer months. There are different nature and horse trails. There is a Braille Nature Trail in a small wooded hollow just off the Great Lawn which was designed for hands-on exploration. The Kathryn A. Porter "Branching Out!" Garden is worked on by children ages 5–13 during a spring after-school and summer program; the course of study includes cooking and crafts. Participants grow vegetables, herbs, and flowers to take home. The Patriots' Path is a network of hiking, biking, and equestrian trails and green open spaces, and links to other parks in New Jersey.(Wikipedia)